No shooter's worth this much waiting, imo, and frankly the story was never good enough to hold me in tenterhooks for 4+ years. Good atmosphere, yeah, but honestly I couldn't care less about minimalistic, ambient, unearth-it-yourself-and-make-your-own-conclusions storytelling than I do right now.
You can polish gold forever but it won't change into platinum. Similarly, you can take a million years perfecting your brand of FPS but you'll still be pointing and shooting. It won't suddenly become MAGIC! or give you a handjob just because you took ten years to make 10 hours' worth of pew-pew. To me it's like the difference between being at 0 degrees and being at -5 degrees: there is one, but I stopped noticing the moment I became numb and used to the idea of being cold.
But I guess I've long since become ambivalent to Half Life. I never found it to be as deep as its fans think it is, and I never thought its brand of plot and storytelling was the ultimate in the video game form. It'll be good, no doubt, but not worth the wait.
ON TOPIC: The next DNF? Haaaaaaaaahahahahahah.
Try being a Shenmue fan waiting for the third installment. Getting constantly teased by Yu Suzuki about how he wants to make it for...how many years has it been now...ten years?